What is the use of compressed air in hospitals?

Compressed air used in hospitals is an indispensable public medium in the medical system and is widely used in many clinical and auxiliary scenarios. Its core role is to provide power for medical equipment, maintain a sterile environment or directly participate in the treatment process. The following is a detailed description of the specific use and technical requirements:

main uses of compressed air in 1. hospitals

1. Respiratory support and anesthesia system

• ventilator and Anesthesia Machine: Compressed air is used as a gas source to drive a ventilator to provide mechanical ventilation support for the patient, or mixed with oxygen for anesthesia induction and maintenance. For example, in the ICU, compressed air is proportionally mixed with oxygen, and the patient's breathing rate and tidal volume are precisely controlled by the ventilator.
• hyperbaric oxygen therapy some hospitals use compressed air as an auxiliary gas source for hyperbaric oxygen chambers to help patients inhale high concentrations of oxygen and promote tissue repair.

2. Surgical and diagnostic equipment drivers

• pneumatic surgical tools: Such as pneumatic bone drills, pneumatic saws, pneumatic staplers, etc., use compressed air to drive high-speed rotation or reciprocating motion to achieve precise cutting and suturing. This kind of tool is widely used in orthopedics, neurosurgery and other surgeries, because it has no risk of electric spark, and is more suitable for humid or flammable environment.
• Dental Equipment: The dental comprehensive treatment table relies on compressed air to drive high-speed turbine handpieces (such as dental drills), three-use guns (water spray/jet/spray), etc., to achieve tooth grinding, cleaning and drying.
• endoscope system: Compressed air is used for the inflation and expansion of endoscopes (such as gastroscopes and colonoscopes), or to drive the mechanical actions of biopsy forceps, cell brushes and other accessories.

3. Medical Gas Mixing and Delivery

• oxygen-air mixing system compressed air is mixed with pure oxygen in proportion to provide a safe gas source for patients who need low concentration oxygen therapy (such as COPD patients with chronic obstructive pulmonary disease) to avoid oxygen poisoning caused by high concentration oxygen.
• Nitrogen preparation some hospitals produce nitrogen through compressed air separation technology to preserve biological samples (such as blood, tissue) or drive liquid nitrogen cryotherapy equipment.

4. Hospital infrastructure operation

• pneumatic conveying system: Compressed air drives the pneumatic pipeline logistics system to realize the rapid transmission of drugs, inspection samples, medical records and other items, and improve the efficiency of hospital operations.
• Cleaning and Disinfection: Compressed air is used to drive pneumatic spray guns, clean stains on the surface of medical devices, or provide initial pressure for high-pressure steam sterilizers.
• Environmental Control some hospitals use compressed air to drive pneumatic curtains, pneumatic doors and other facilities to reduce personnel contact and reduce the risk of cross-infection.

Technical requirements for compressed air in 2. hospitals

1. Air quality standards

hospital compressed air must meet ISO 8573-1:2010 Class 0 standard (oil content ≤ 0.01 mg/m & sup3;), and meet the following requirements:

• solid particle: Diameter ≤ 0.01 μm to ensure no particle pollution.
• Moisture content: Dew point ≤-40 ℃ (under normal pressure) to prevent condensed water from breeding bacteria.
• Microorganisms sterile state to avoid aerosol transmission of pathogens.

2. Equipment selection and layout

• oil-free air compressor: Dry oil-free screw air compressor or water-lubricated oil-free air compressor is preferred to prevent oil pollution from the source. For example, Shanghai Granklin Group Class 0 certification, far better than the standard requirements.
• Independent gas supply system independent air compressor units shall be set up in key areas such as operating room and ICU to avoid cross-contamination with other areas.
• Redundant design: Equipped with spare air compressor and air storage tank to ensure the continuity of air supply and avoid medical interruption due to equipment failure.

3. Maintenance and monitoring

• regular inspection: Quarterly test the oil content, particulate matter and microbial indicators of compressed air to ensure compliance with standards.
• Filter Element Replacement according to the frequency of use, replace the pre-filter, precision filter and activated carbon filter every 3-6 months to prevent pollution caused by the failure of the filter element.
• Equipment cleaning: Regularly clean the condensate discharge pipeline inside the air compressor to avoid bacterial growth.

3. typical application scenarios

1. Operating room pneumatic tools

• scene: In orthopedic surgery, doctors use pneumatic bone drills for bone fixation.
• Requirements: The compressed air shall be oil-free, water-free and particle-free to avoid oil contamination of the surgical incision or affecting the performance of the bone drill.
• Solution adopt dry oil-free air compressor + three-stage filtration system (pre-filter + precision filter + activated carbon filter) to ensure the cleanliness of the air source.

2. Intensive care unit (ICU) respiratory support

• scene: Providing low-concentration oxygen therapy to patients with COPD.
• Requirements the mixing ratio of compressed air and oxygen is accurate (such as 21% oxygen + 79% air), and the air source is sterile and has no peculiar smell.
• Solution: Use water-lubricated oil-free air compressor and medical-grade mixer to adjust the ratio in real time with the online monitoring system.

3. Dental comprehensive treatment table

• scene: In dental treatment, the high-speed turbine handpiece needs to rotate at a high speed (the speed can reach 400000 rpm).
• Requirements compressed air has stable pressure (0.5-0.6MPa) and low oil content (≤ 0.001ppm) to avoid oil mist polluting the mouth or damaging the mobile phone bearing.
• Solution adopt small oil-free air compressor + oil-water separator to ensure the quality of gas source.

4. Summary

hospital compressed air is a key element of medical safety, and its use covers respiratory support, surgical drive, gas mixing, infrastructure and other fields. In order to ensure the safety of patients, the hospital should strictly choose oil-free air compressor, configure multi-stage filtration system, and establish regular inspection and maintenance mechanism. With the development of medical technology, compressed air systems are being upgraded in the direction of intelligence and modularization, such as real-time monitoring of air source quality through Internet of Things technology, or the use of integrated gas supply stations to reduce the floor space, further improving hospital operational efficiency and medical quality.